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Canada Thistle

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Canada Thistle
Cirsium arvense
 
Rosette

Leaves have spiny tipped lobes.
Adult

Canada thistle is a perennial plant usually from one to four feet tall, in sparse to extremely dense colonies.
Flower

Flowerheads are softly spined, light pink to purple to white, and are typically three-quarter inch in diameter. Bloom occurs in July and August.
Weed Infestation

A native to southeastern Eurasia, Canada thistle reproduces by seeds and rootstock. It is adaptable to a diverse range of habitats.
Seed

Seed is attached to a soft parachute-like plume.
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